/*******************************************************************************
 * 版权：北京润尼尔网络科技有限公司，保留所有版权<br>
 * 版本：v1.0.0<br>
 * 文件：uuid_utils.js<br>
 * 日期：2016年7月25日<br>
 * 作者: 杨顺强<br>
 * 功能：生成uuid对象，通过内部函数，完成uuid值得生成<br>
 * 
 * 修改记录：<br>
 * 日期 描述 更新功能<br>
 ******************************************************************************/
;(function(){
	
	//定义名称空间变量
	var namespace = {};

	//创建名称空间:Rainier.Basic
	//根据NodeJS后端还是web前端判断应该创建名称空间的根对象
	if((typeof(window) !== "undefined")){
		makeNamespace(window,"Rainier.Basic");
		namespace = window.Rainier.Basic;
	}else{
		namespace = exports;
	}
	
	var UUID = function() {
		  'use strict';
		
		  // Unique ID creation requires a high quality random # generator.  We feature
		  // detect to determine the best RNG source, normalizing to a function that
		  // returns 128-bits of randomness, since that's what's usually required
		  var _rng, _mathRNG, _nodeRNG, _whatwgRNG, _previousRoot;
		  var _window = ('undefined' !== typeof window ? window : null);
		  function setupBrowser() {
		    // Allow for MSIE11 msCrypto
		    var _crypto = _window.crypto || _window.msCrypto;
		
		    if (!_rng && _crypto && _crypto.getRandomValues) {
		      // WHATWG crypto-based RNG - http://wiki.whatwg.org/wiki/Crypto
		      //
		      // Moderately fast, high quality
		      try {
		        var _rnds8 = new Uint8Array(16);
		        _whatwgRNG = _rng = function whatwgRNG() {
		          _crypto.getRandomValues(_rnds8);
		          return _rnds8;
		        };
		        _rng();
		      } catch(e) {}
		    }
		
		    if (!_rng) {
		      // Math.random()-based (RNG)
		      //
		      // If all else fails, use Math.random().  It's fast, but is of unspecified
		      // quality.
		      var  _rnds = new Array(16);
		      _mathRNG = _rng = function() {
		        for (var i = 0, r; i < 16; i++) {
		          if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
		          _rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
		        }
		
		        return _rnds;
		      };
		      if ('undefined' !== typeof console && console.warn) {
		        console.warn("[SECURITY] node-uuid: crypto not usable, falling back to insecure Math.random()");
		      }
		    }
		  }
		
		  function setupNode() {
		    // Node.js crypto-based RNG - http://nodejs.org/docs/v0.6.2/api/crypto.html
		    //
		    // Moderately fast, high quality
		    if ('function' === typeof require) {
		      try {
		        var _rb = require('crypto').randomBytes;
		        _nodeRNG = _rng = _rb && function() {return _rb(16);};
		        _rng();
		      } catch(e) {}
		    }
		  }
		
		  if (_window) {
		    setupBrowser();
		  } else {
		    setupNode();
		  }
		
		  // Buffer class to use
		  var BufferClass = ('function' === typeof Buffer) ? Buffer : Array;
		
		  // Maps for number <-> hex string conversion
		  var _byteToHex = [];
		  var _hexToByte = {};
		  for (var i = 0; i < 256; i++) {
		    _byteToHex[i] = (i + 0x100).toString(16).substr(1);
		    _hexToByte[_byteToHex[i]] = i;
		  }
		
		  // **`parse()` - Parse a UUID into it's component bytes**
		  function parse(s, buf, offset) {
		    var i = (buf && offset) || 0, ii = 0;
		
		    buf = buf || [];
		    s.toLowerCase().replace(/[0-9a-f]{2}/g, function(oct) {
		      if (ii < 16) { // Don't overflow!
		        buf[i + ii++] = _hexToByte[oct];
		      }
		    });
		
		    // Zero out remaining bytes if string was short
		    while (ii < 16) {
		      buf[i + ii++] = 0;
		    }
		
		    return buf;
		  }
		
		  // **`unparse()` - Convert UUID byte array (ala parse()) into a string**
		  function unparse(buf, offset) {
		    var i = offset || 0, bth = _byteToHex;
		    return  bth[buf[i++]] + bth[buf[i++]] +
		            bth[buf[i++]] + bth[buf[i++]] + '-' +
		            bth[buf[i++]] + bth[buf[i++]] + '-' +
		            bth[buf[i++]] + bth[buf[i++]] + '-' +
		            bth[buf[i++]] + bth[buf[i++]] + '-' +
		            bth[buf[i++]] + bth[buf[i++]] +
		            bth[buf[i++]] + bth[buf[i++]] +
		            bth[buf[i++]] + bth[buf[i++]];
		  }
		
		  // **`v1()` - Generate time-based UUID**
		  //
		  // Inspired by https://github.com/LiosK/UUID.js
		  // and http://docs.python.org/library/uuid.html
		
		  // random #'s we need to init node and clockseq
		  var _seedBytes = _rng();
		
		  // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
		  var _nodeId = [
		    _seedBytes[0] | 0x01,
		    _seedBytes[1], _seedBytes[2], _seedBytes[3], _seedBytes[4], _seedBytes[5]
		  ];
		
		  // Per 4.2.2, randomize (14 bit) clockseq
		  var _clockseq = (_seedBytes[6] << 8 | _seedBytes[7]) & 0x3fff;
		
		  // Previous uuid creation time
		  var _lastMSecs = 0, _lastNSecs = 0;
		
		  // See https://github.com/broofa/node-uuid for API details
		  function v1(options, buf, offset) {
		    var i = buf && offset || 0;
		    var b = buf || [];
		
		    options = options || {};
		
		    var clockseq = (options.clockseq != null) ? options.clockseq : _clockseq;
		
		    // UUID timestamps are 100 nano-second units since the Gregorian epoch,
		    // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
		    // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
		    // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
		    var msecs = (options.msecs != null) ? options.msecs : new Date().getTime();
		
		    // Per 4.2.1.2, use count of uuid's generated during the current clock
		    // cycle to simulate higher resolution clock
		    var nsecs = (options.nsecs != null) ? options.nsecs : _lastNSecs + 1;
		
		    // Time since last uuid creation (in msecs)
		    var dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs)/10000;
		
		    // Per 4.2.1.2, Bump clockseq on clock regression
		    if (dt < 0 && options.clockseq == null) {
		      clockseq = clockseq + 1 & 0x3fff;
		    }
		
		    // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
		    // time interval
		    if ((dt < 0 || msecs > _lastMSecs) && options.nsecs == null) {
		      nsecs = 0;
		    }
		
		    // Per 4.2.1.2 Throw error if too many uuids are requested
		    if (nsecs >= 10000) {
		      throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
		    }
		
		    _lastMSecs = msecs;
		    _lastNSecs = nsecs;
		    _clockseq = clockseq;
		
		    // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
		    msecs += 12219292800000;
		
		    // `time_low`
		    var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
		    b[i++] = tl >>> 24 & 0xff;
		    b[i++] = tl >>> 16 & 0xff;
		    b[i++] = tl >>> 8 & 0xff;
		    b[i++] = tl & 0xff;
		
		    // `time_mid`
		    var tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
		    b[i++] = tmh >>> 8 & 0xff;
		    b[i++] = tmh & 0xff;
		
		    // `time_high_and_version`
		    b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
		    b[i++] = tmh >>> 16 & 0xff;
		
		    // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
		    b[i++] = clockseq >>> 8 | 0x80;
		
		    // `clock_seq_low`
		    b[i++] = clockseq & 0xff;
		
		    // `node`
		    var node = options.node || _nodeId;
		    for (var n = 0; n < 6; n++) {
		      b[i + n] = node[n];
		    }
		
		    return buf ? buf : unparse(b);
		  }
		
		  // **`v4()` - Generate random UUID**
		
		  // See https://github.com/broofa/node-uuid for API details
		  function v4(options, buf, offset) {
		    // Deprecated - 'format' argument, as supported in v1.2
		    var i = buf && offset || 0;
		
		    if (typeof(options) === 'string') {
		      buf = (options === 'binary') ? new BufferClass(16) : null;
		      options = null;
		    }
		    options = options || {};
		
		    var rnds = options.random || (options.rng || _rng)();
		
		    // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
		    rnds[6] = (rnds[6] & 0x0f) | 0x40;
		    rnds[8] = (rnds[8] & 0x3f) | 0x80;
		
		    // Copy bytes to buffer, if provided
		    if (buf) {
		      for (var ii = 0; ii < 16; ii++) {
		        buf[i + ii] = rnds[ii];
		      }
		    }
		
		    return buf || unparse(rnds);
		  }
		
		  // Export public API
		  var uuid = v4;
		  uuid.v1 = v1;
		  uuid.v4 = v4;
		  uuid.parse = parse;
		  uuid.unparse = unparse;
		  uuid.BufferClass = BufferClass;
		  uuid._rng = _rng;
		  uuid._mathRNG = _mathRNG;
		  uuid._nodeRNG = _nodeRNG;
		  uuid._whatwgRNG = _whatwgRNG;
		
		  /*if (('undefined' !== typeof module) && module.exports) {
		    // Publish as node.js module
		    module.exports = uuid;
		  } else if (typeof define === 'function' && define.amd) {
		    // Publish as AMD module
		    define(function() {return uuid;});
		
		
		  } else {
		    // Publish as global (in browsers)
		    _previousRoot = _window.uuid;
		
		    // **`noConflict()` - (browser only) to reset global 'uuid' var**
		    uuid.noConflict = function() {
		      _window.uuid = _previousRoot;
		      return uuid;
		    };
		
		    _window.uuid = uuid;
		  }*/
		  return uuid;
		};
	namespace.UUID = UUID;
})()

